| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Hi @Rick88 your image looks OK - but your infrared image may benefit from being white balanced - there are some good resources here at #white-balan..." | Read more » | about 3 years ago | |||
| Rick88 | "Hi Warren, I followed through your tutorial. Here is the VIS and NIR images that I captured VIS Image NIR Image This the output generated wi..." | Read more » | about 3 years ago | |||
| cfastie | "Hi Rayishido, They are beautiful mosaics. I didn't have any problem using these images in Fiji. But the Photo Monitoring plugin does not do a very..." | Read more » | over 8 years ago | |||
| Rayishido | "VIS " | Read more » | over 8 years ago | |||
| Rayishido | "Hi, Iam back with some update on the project. I didn't tweak the program but I brought the written 87 filter. and put everything on my phantom 2. ..." | Read more » | over 8 years ago | |||
| cfastie | "That's a good description of what the Rosco blue filter does. Both the blue and the red channels will have a mixture of visible and NIR light. The ..." | Read more » | almost 9 years ago | |||
| Rayishido | "Hi! I was in the filed without internet. I wrote a program that trigger the photo on the second pi when a picture is taken with the first so it is..." | Read more » | almost 9 years ago | |||
| cfastie | "Do you know how well synchronized the photo pairs are? Do you have to start them both taking photos at the same time, or synchronize their clocks? ..." | Read more » | almost 9 years ago | |||
| Rayishido | "I am using 2 raspberry Pis (one camera on each) and I synchronize the shutters using interrupts. I had some strange behavior (one Pi taking more pi..." | Read more » | almost 9 years ago | |||
| cfastie | "The NDVI image in my last comment was made by stretching only the NIR channel. The default is to stretch both NIR and VIS and that usually works we..." | Read more » | almost 9 years ago | |||
| Rayishido | "Hi Chris, to obtain this picture you stretched the histogram of the visible or visible and IR. As far as I understand to make NDVI picture a visib..." | Read more » | almost 9 years ago | |||
| cfastie | "Both NDVI images look good. Both seem to have some biological meaning and both have reasonable NDVI values in areas that are shady which is very go..." | Read more » | almost 9 years ago | |||
| Rayishido | "Hi Chris! You assumed right! :D The pictures was taken with the pi noir and the blue filter and turned off the automatic white balance to set my o..." | Read more » | almost 9 years ago | |||
| cfastie | "Rayishido, I assume the orangish photo was taken with the PiNoir camera with a blue filter. By calibration I think you mean you used the AWB_gains..." | Read more » | almost 9 years ago | |||
| Rayishido | "Hi! Thank you very much for your answers! I have downloaded Fiji and it's plugin and will test as soon as possible. This weekend I am going to mak..." | Read more » | almost 9 years ago | |||
| cfastie | "Hi Rayishido, Nice Pi photos. Claytonb is correct about the shadows. It's a common artifact for dark areas to have very high NDVI values. In your ..." | Read more » | almost 9 years ago | |||
| Claytonb | "@Rayishido -the high NDVI values is a normal occurrence with shadows. You will notice that the NDVI values will change in the shadows depending on ..." | Read more » | almost 9 years ago | |||
| mathew | "you may want to connect with @John_Wells and the West Lothian Archaeological Society about filters for identifying underground features. They've b..." | Read more » | about 9 years ago | |||
| rahulrajias | "is it possible to operate/connect 2 pi cameras simultaneously with one pi ??? " | Read more » | about 9 years ago | |||
| cfastie | "Correct. If the Wratten 25A camera requires exposures that are too long, you can just shoot normal photos and use the red channel for VIS (so don't..." | Read more » | about 9 years ago | |||
| Steven | "Ok, so if I understand you correctly, using a standard PiCam with the IR filter un-removed and a Wratten 25A filter added to the PiCam, while takin..." | Read more » | about 9 years ago | |||
| cfastie | "If you use the Fiji plugin to make NDVI, you will not need the techniques in the video above. The plugin does the comparison of NIR and VIS for eac..." | Read more » | about 9 years ago | |||
| Steven | "Thanks, that's helpful . Yes, it is possible to operate two PI cameras from one Pi (though I'm still sorting through the debate/speculation about t..." | Read more » | about 9 years ago | |||
| cfastie | "Can you operate two Pi cameras from one Pi? If so, you should be able to trigger the shutters simultaneously which is important. The Pi NoIR could ..." | Read more » | about 9 years ago |